Hi, so I'm a 15 y/o female and I'm worried. I have a painful,small,hard lump on the outside of my left tricep. The pain radiates in about a 2 in radius from the lump. What could this be and what should I do about it? (Also, though it might not be connected, I have a slight pain in my chest, behind my right breast.)DOIACTUALLYHAVETOPAY?!?WHATTHEHECK?!?